---
id: CVE-2026-74458
title: >-
  can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command
  extents
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command
  extents


  The wait and bulk receive paths walk variable-length commands from a

  USB buffer. A …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 <
    c00ec53d7dec08134e97071850cc00ef000c5b77
  - >-
    Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 <
    d9e91672526ffa279709b15490118aea1bdee714
  - >-
    Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 <
    72f96c2942f11a0ae8663adcb3d9ee986e07d4fa
  - >-
    Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 <
    695aea154bb2d453e6daada1510972fafd075285
  - >-
    Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 <
    3d0897ec623e422695d70d80ae456f89476c5328
  - >-
    Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 <
    185cb1fa38142a3cbf223dd8b3abb24217f330d3
  - >-
    Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 <
    21f0465fd86d77794aaed8e05f833634f68d178d
  - >-
    Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 <
    0293dd153f9dbc1ddf5dacdccc76b363bce4a8ee
  - Linux 3.8
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:57:40.922454Z'
published: '2026-08-15'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T17:05:46.582Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74458'
references:
  - url: 'https://git.kernel.org/stable/c/c00ec53d7dec08134e97071850cc00ef000c5b77'
  - url: 'https://git.kernel.org/stable/c/d9e91672526ffa279709b15490118aea1bdee714'
  - url: 'https://git.kernel.org/stable/c/72f96c2942f11a0ae8663adcb3d9ee986e07d4fa'
  - url: 'https://git.kernel.org/stable/c/695aea154bb2d453e6daada1510972fafd075285'
  - url: 'https://git.kernel.org/stable/c/3d0897ec623e422695d70d80ae456f89476c5328'
  - url: 'https://git.kernel.org/stable/c/185cb1fa38142a3cbf223dd8b3abb24217f330d3'
  - url: 'https://git.kernel.org/stable/c/21f0465fd86d77794aaed8e05f833634f68d178d'
  - url: 'https://git.kernel.org/stable/c/0293dd153f9dbc1ddf5dacdccc76b363bce4a8ee'
tags:
  - cve.org
epss: 0.00177
epssPercentile: 0.07251
ingestedAt: '2026-11-06T18:00:12.556Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents

The wait and bulk receive paths walk variable-length commands from a
USB buffer. A nonzero command shorter than CMD_HEADER_LEN can still be
dispatched, and the wait path copies a matching command into a fixed
caller-owned struct kvaser_cmd using the device-provided length.

Reject nonzero commands that do not contain the fixed header or that
extend beyond the current USB buffer item. In the wait path, also reject
a matching command that exceeds the destination before copying it.

## Affected

- `Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 < c00ec53d7dec08134e97071850cc00ef000c5b77`
- `Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 < d9e91672526ffa279709b15490118aea1bdee714`
- `Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 < 72f96c2942f11a0ae8663adcb3d9ee986e07d4fa`
- `Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 < 695aea154bb2d453e6daada1510972fafd075285`
- `Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 < 3d0897ec623e422695d70d80ae456f89476c5328`
- `Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 < 185cb1fa38142a3cbf223dd8b3abb24217f330d3`
- `Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 < 21f0465fd86d77794aaed8e05f833634f68d178d`
- `Linux >= 080f40a6fa28dab299da7a652e444b1e2d9231e7 < 0293dd153f9dbc1ddf5dacdccc76b363bce4a8ee`
- `Linux 3.8`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.